I see alot of guys posting ISO about BP ads, if they are real providers or not. The following is a simple way to determine if the photos belong to someone else or being used elsewhere. I'm sure some of you already know how to do this, or use Tineye. I have had better luck using Google Images, which turns up more results.
1. Go to Google.com
2. Click the Images link at top
3. Right click on photo in question, copy image url. For example, a photo on backpage post.
4. Go back to Google images search field, right click and paste the previously copied url and click search button
5. When/if nothing is returned click link above that says "for matching images, try search by image -- at this time, you will see all images matching the one in question.
6. Problem solved - you know where the images originated or where else they are being used.
Happy Hunting!